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Influence of ZnO Surface Modification on the Photocatalytic Performance of ZnO/NiO Thin Films

  • Shanmugapriya PeriyannanEmail author
  • Laura Manceriu
  • Ngoc Duy Nguyen
  • Andreas Klein
  • Wolfram Jaegermann
  • Pierre Colson
  • Catherine Henrist
  • Rudi Cloots
Article
  • 29 Downloads

Abstract

Charge carrier separation is considered as a key factor in enhancing the photocatalytic process and can be maximized by mitigating surface recombination. Following this idea, the surface of zinc oxide (ZnO) was modified by thermal treatment and nickel oxide (NiO) deposition. The influence of the ZnO thermal treatment and NiO deposition conditions on the ZnO surface chemistry and heterostructure interface properties were investigated by in situ X-ray photoelectron spectroscopy (XPS) and photoluminescence (PL) and correlated to the dye photodegradation efficiency. The XPS analysis confirmed a change of doping of ZnO after thermal treatment, which mainly influenced the developed band bending, and has led to an improved photocatalytic activity. For the same reason, the heterostructures based on the surface cleaned ZnO surface had higher photocatalytic efficiency than the ones based on non-cleaned ZnO. The temperature input during NiO deposition had negligible effect on the heterostructure interface properties. The photocatalytic efficiency did not follow the band bending evolution because of a dominant contribution of charge recombination across the NiO layer as indicated by PL analysis.

Graphical Abstract

Keywords

Heterogeneous catalysis Catalysis Thin films Methodology and phenomena XPS Microscopy Spectroscopy and general characterisation Photoluminescence ZnO/NiO Surface modification Band bending Photocatalytic activity 

Notes

Acknowledgements

This work was carried out in the framework of EJD-FunMat (European Joint Doctorate for Multifunctional Materials) and has received funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Sklodowska Curie Grant Agreement No. 641640.

Compliance with Ethical Standards

Conflicts of interest

The authors declare no conflict of interest.

Supplementary material

10562_2019_2781_MOESM1_ESM.docx (4 mb)
Supplementary material 1 (DOCX 4104 kb)

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  • Shanmugapriya Periyannan
    • 1
    • 2
    Email author
  • Laura Manceriu
    • 1
  • Ngoc Duy Nguyen
    • 3
  • Andreas Klein
    • 2
  • Wolfram Jaegermann
    • 2
  • Pierre Colson
    • 1
  • Catherine Henrist
    • 1
  • Rudi Cloots
    • 1
  1. 1.GREENMAT-LCIS, CESAM Research Unit, Institute of ChemistryUniversite de LiegeLiegeBelgium
  2. 2.Surface Science Division, Institute of Materials ScienceTechnische Universitat DarmstadtDarmstadtGermany
  3. 3.SPIN, CESAM Research Unit, Institute of PhysicsUniversite de LiegeLiegeBelgium

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